Possible Clues:

• Lip-reading alt.
• "The Miracle Worker" comm. method
• Moving communication: Abbr
• Syst. for the deaf
• Hand writing?: Abbr.
• Handmade communication syst.?
• Syst. for talking without speaking
• Handy thing to know?: Abbr.
• Digital interface?: Abbr.
• Visual communication: Abbr.